Rolling device for pin-machines.



c. A. BENKE. ROLLING DEVICE FOR PIN MACHINES.

APPLICATION FILED APR. 9.19M-

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C. A. BENKE. ROLLING DEVICE FOR PIN MACHINES. APPLICATION FILED APR. 9. I917.

1 ,278,833. Patented Sept. 17, 1918.7

3 SHEETS-SHEET 2- MWZM W INF NORRIS PEYERS co.. Puomurnmjumsmuc m". u. c

C. A. BENKE.

ROLLING DEVICE FOR PIN MACHINES. APPLICATION FILED APR. 9. I917.

1,278,833. Patented Sept. 17, 1918.

3 SHEETS-SHEET 3- "UNITED STATES PATENT OFFICE.

CHARLES A. BENKE, OF DETROIT, MICHIGAN, ASSIGNOR TO NATIONAL PIN CO., OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

ROLLING DEVICE FOR PIN-MACHINES.

Specification of Letters Patent.

Patented Sept. 17, 1918.

To all whom it may concern:

Be it known that I, CHARLES A. BENKE, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Roll ing Devices for Pin-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to means for feeding pins through a pointing machine and to an arrangement thereof whereby the pins are held firmly and progressed substantially positively past the operating member's whereby they are sharpened symmetrically.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a view in elevation, partially broken away and in section,of a pin pointing machine equipped with means which embody features of the invention;

Fig. 2 is a plan view of the machine in part, and of the invention;

Fig. 3 is a view in end elevation of the machine, and

Figs. 4, 5 and 6 are views in detail of feed chain links that are employed in the device.

As herein shown, a pin pointing machine of the usual type has a foot plate 1 lying between a pair of feed rolls 2 and 3 that are screwthreaded, to receive respectively the head and the body of a pin, the pin extending radially from the roll 2 across the plate and lying substantially tangentially across the other roll 3 and in the threads of the latter. An outer annular plate 4: with cooperating and reciprocating grinding members 5 of the usual type constitute the main members of the machine proper with details of the feed and controlling mechanism which are not shown herein, as the machine per 86 does not form a part of the invention.

shaft 7 to turn in a plane above the foot plate 1 and thereby drive an endless feed sprocket chain 8 around an idler 9 in such manner as to traverse the plate 1 throughout its length substantially, the links of the chain being so disposed and designed as to present a substantially unbroken tread surface that is parallel to the upper face of the plate 1. To insure contact with the plate 1, presser fingers 10 that rest at theinner ends A sprocket wheel 6 is mounted on a drive on bearing lugs 29, have shoes 11 on the other ends riding on the chain against which they are yieldingly forced by spring fingers 12, the tension of each spring being regulated by a thumb nut 13 and stud 14: transverse to the spring.

A further guard against irregularities in the chain feed is provided for in the shape of a friction feed roll 15 that is carried on a shaft 16 driven by a pinion 17 in mesh with a gear 18 on the end portion of the shaft 2 removed from the plate 1.

To provide for irregularities a yoke frame 19 has bearings 20 in which the shaft 16 is journaled, the yoke being oscillatory on a pivot stud or pin 21 disposed in the main frame as close as convenient to the gear 18 so that a considerable movement of the roll 15 may occur without substantially disturbing the relations of the gear 18 and pinion 17.

v The sprocket chain links may be formed as indicated in Fig. 4 with the end portions thereof alternately tenoned and recessed while the tread face 24 of each is such that when pressure is exerted in the face of the chain the rule joints between the links caused by the particular formation thereof, prevent the chain from breaking inwardly or away from the face. This same result is obtained also by a slight modification of the links as shown in Fig. 5 wherein pairs of oppositely disposed sections 25 with rabbeted ends, engage correspondingly tongued intermediate one-piece sections 26, the rule joint feature being maintained as well as the continuous outer tread. The same result is obtained by the construction shown in Fig. 6 having one-piece links 27 tenoned at each end and coupled by ooperating pairs of plates 28 this arrangement likewise having the one-way hinge joint and affording the continuous or unbroken feeding tread.

As a result of this construction, a feeding device for pin sharpening machine is obtained that cooperates with the feed rail or shoe of the machine in exerting a substantially continuous rolling pressure on the pin bodies in such a manner as to insure their regular rotation and consequent symmetrical grinding. Furthermore the chains can Wear to a considerable extent without the necessity of replacing them and as the material is such as to induce long use without appreciable distortion the chains do not have to be replaced as do the feed belts frequently used and the time lost in readjustment and refitting of'the machine is saved. Furthermore the chains transmit the yielding pressure of the overlying shoes more evenly, necessarily, than do the belts which are locally flexible between the spring pressure members, the chain bridging across the gaps because of its inability to break upwardly or away from the pins on which it is moving,

Obviously, changes in the details of construction may be'made without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangement of partsexcept asset forth in the appended claims.

What'I claim is 1. In a pin pointing machine wherein the pins are progressed past grinding members in a regular series, an endless feed chain presenting a substantially unbroken pin gripping surfaceand rule joints breaking toward thepins, and means driven by friction for causing the chain to move along the path of travel of the pins;

'2. In a pin pointing machine wherein the pins are progressed past grinding members 1n a regular series, an endless feed chain presenting a substantially unbroken pin gripping surface and rule joints breaking toward the pins, asprocket wheel for driving the chain, friction means for rotating the sprocket wheel, and means for maintaining the chainin yielding contact with the pins.

3. In a pin pointing machine wherein the pins are progressed past grinding members in a regular series, an endless feed chain presenting a substantially unbroken pin gripping surface and rule joints breaking toward the pins, a sprocket drive wheel:for the chain, a sprocket idlerf for the chain, and an oscillatory presser roll driven positively and yieldingly forced against the 'chain where it rides on to said sprocket wheel to rotate the latter.

4.111 a pin pointing machine wherein the pins are progressed past grinding members in a regular series, an endless metallic flexible member presenting a substantially unbroken pin gr-ipping surface, and friction means" for causing the chain to move. along the path of travel of the pins.

In testimony whereof I affix my signature in the presence of two witnesses.

CHARLES A. :BENKE.

Witnesses: I

ANNA M. DORR, CHARLES BELG.

Copies of this patent may be obtained for five cents each,'-"by addressing the Commissioner of ratents,

Washington, D. G. I 

